Snapshotting of global state, factored out of PHPUnit into a stand-alone component.
To add this package as a local, per-project dependency to your project, simply add a dependency on sebastian/global-state to your project's composer.json file. Here is a minimal example of a composer.json file that just defines a dependency on GlobalState:
{
"require": {
"sebastian/global-state": "1.0.*"
}
}